<template>
    <div>
        <el-table
          ref="dataTable"
          :data="dataSource.list || []"
          :height="tableHeight"
          :stripe="options.stripe"
          :border="options.border"
          header-row-class-name="table-header-row"
          highlight-current-row
          @row-click="handleRowClick"
          @selection-change="handleSelectionChange"
        >
          <!-- selection选择框 -->
          <el-table-column
            v-if="options.selectType && options.selectType == 'checkbox'"
            type="selection"
            width="50"
            align="center"
          ></el-table-column>
          <!-- 序号 -->
          <el-table-column
            v-if="options.showIndex"
            label="序号"
            type="index"
            width="60"
            align="center"
          ></el-table-column>
          <!-- 数据列 -->
          <template v-for="(column, index) in columns">
            <template v-if="column.scopedSlots">
              <el-table-column
                :key="index"
                :prop="column.prop"
                :label="column.label"
                :align="column.align || 'left'"
                :width="column.width"
              >
                <template #default="scope">
                  <slot
                    :name="column.scopedSlots"
                    :index="scope.$index"
                    :row="scope.row"
                  >
                  </slot>
                </template>
            </el-table-column>
          </template>
          <template v-else>
            <el-table-column
              :key="index"
              :prop="column.prop"
              :label="column.label"
              :align="column.align || 'left'"
              :width="column.width"
              :fixed="column.fixed"
            >
            </el-table-column>
          </template>
         </template>
        </el-table>
        <!-- 分页 -->
        <div class="pagination" v-if="showPagination">
          <el-pagination
            v-if="dataSource.totalCount"
            background
            :total="dataSource.totalCount"
            :page-sizes="[15, 30, 50, 100]"
            :page-size="dataSource.pageSize"
            :current-page.sync="dataSource.pageNo"
            :layout="layout"
            @size-change="handlePageSizeChange"
            @current-change="handlePageNoChange"
            style="text-align: right"
          ></el-pagination>
        </div>
    </div>
</template>
<script setup>
import { ref, computed } from "vue";

const emit = defineEmits(["rowSelected", "rowClick"]);
const props = defineProps({
    dataSource: Object,
    showPagination: {
        type: Boolean,
        default: true,
    },
    showPageSize: {
        type: Boolean,
        default: true,
    },
    options: {
        type: Object,
        default: {
            extHeight: 0,
            showIndex: false,
        },
    },
    columns: Array,
    fetch: Function, // 获取数据的函数
    initFetch: {
        type: Boolean,
        default: true,
    },
});

const layout = computed(() => {
    return `total, ${
        props.showPageSize ? "sizes" : ""
    }, prev, pager, next, jumper`;
});
// 顶部 60 , 内容区域距离顶部 20, 内容上下内间距 15*2 分页区域高度 46
const topHeight = 60 + 20 + 30 + 46;

const tableHeight = ref(
    props.options.tableHeight
    ? props.options.tableHeight
    : window.innerHeight - topHeight - props.options.extHeight
);

// 初始化
const init = () => {
    if (props.initFetch && props.fetch) {
        props.fetch();
    }
};
init();

const dataTable = ref();
// 清除选中
const clearSelection = () => {
    dataTable.value.clearSelection();
};

// 设置行选中
const setCurrentRow = (rowKey, rowValue) => {
    let row = props.dataSource.list.find((item) => {
        return item[rowKey] === rowValue;
    });
    dataTable.value.setCurrentRow(row);
};
// 将子组件暴露出去, 否则父组件无法调用
defineExpose({ setCurrentRow, clearSelection });

// 行点击
const handleRowClick = (row) => {
    emit("rowClick", row);
};

// 多选
const handleSelectionChange = (row) => {
    emit("rowSelected", row);
};

// 切换每页大小
const handlePageSizeChange = (size) => {
    props.dataSource.pageSize = size;
    props.dataSource.pageNo = 1;
    props.fetch();
};
// 切换页码
const handlePageNoChange = (pageNo) => {
    props.dataSource.pageNo = pageNo;
    props.fetch();
};
</script>
<style lang="scss" scoped>
.pagination {
    padding-top: 10px;
    padding-right: 10px;
}
.el-pagination {
    justify-content: right;
}

:deep .el-table__cell {
    padding: 4px 0px;
}
</style>
